I'd look at engagement ratio before interest score when comparing UnInbox and Zero. A product can buy visibility. It can't buy sustained discussion.
Side-by-side comparison of UnInbox and Zero based on community engagement data.
Open source modern email for teams and professionals
AI native email client
I'd look at engagement ratio before interest score when comparing UnInbox and Zero. A product can buy visibility. It can't buy sustained discussion.
| Category | UnInbox | Zero |
|---|---|---|
| Yes | Yes | |
| GitHub | Yes | Yes |
| Open Source | Yes | - |
| Productivity | Yes | Yes |
| Writing | - | Yes |
Hey everyone! After months of planning and development, we're opening the doors to the future of email - launching here on Product Hunt 🎉 In 2023 I was super frustrated at the state of email, how much chaos there is, the lack of flexibility, the endless stream of random junk - let alone the privacy ...
I just use the product and it's completely stun me!!!! Such a game changer in emailing between individuals
Haven’t found on GitHub readme how to actually host it for real domain and email. so to avoid paying $5/m to either Google or AWS for such a simple service. So passing by… Please, if you have that in Discord - add to GitHub as well. At least for some major cloud providers.
We built Zero to help people spend less time on email and spend more on what they truly care about. Zero allows you to write emails and organize your inbox in the way you want it to.
Zero redefines email with AI-native intelligence! ✉️🤖 Auto-prioritizes, drafts replies, and blocks noise - finally an inbox that works for you.
Last week I've been using @Zero for my three main email accounts, and it's been amazing. I love the product. They're killing it!
UnInbox leads on raw interest score. UnInbox leads on engagement ratio. UnInbox leads on both metrics. That doesn't happen often.
These products share 3 categories: Email, GitHub, Productivity. High category overlap means they're competing for the same users directly.
UnInbox is also tagged in Open Source, which Zero isn't. That suggests UnInbox positions itself more broadly or targets an adjacent audience.
Zero has unique category tags in Writing. Different positioning can mean a different buyer profile, even within the same space.
UnInbox launched Apr 2024. Zero launched May 2025. UnInbox has had more time to iterate and build a user base. Zero had the advantage of launching into a more defined market with clearer user expectations.
UnInbox has a 0.20 engagement ratio (average), based on 174 discussion threads across 890 interest points. Middle of the pack for Email. Enough discussion to suggest real usage, but not the kind of buzz that indicates a category-defining product.
Zero has a 0.12 engagement ratio (below average), based on 107 discussions across 857 interest points. The low ratio suggests a launch that got attention but didn't convert that attention into sustained interest.
Within the Email category (616 total products), UnInbox ranks #4 and Zero ranks #5 by interest score. UnInbox sits in the top 10 for the category.
UnInbox is in the top 1% of Email by interest. Zero is in the top 1%.
Pick UnInbox if you want the product with the larger community behind it; sustained discussion and active users are your priority; you value stability and a longer track record; you need something that also covers Open Source.
Pick Zero if community size matters less to you than engagement depth; you prefer newer tools with fresher tech; you need something that also covers Writing.
UnInbox: A standalone email system that flips current experiences on their heads. Chat first approach with native collaboration. And soon powerful automations and integrations
Zero: Zero is an AI native email client that manages your inbox, so you don't have to.
These products also compete in the Email, GitHub, Productivity categories:
Damn Good Tools — Easy-to-use, fun productivity tools - free & open-source (Interest: 508, Engagement: 0.24)
Loopple — Drag & drop dashboard builder (Interest: 493, Engagement: 0.43)
Stella AI — Automate your daily admin tasks with Stella AI agent (Interest: 493, Engagement: 0.14)
CoPilot.Live — Your personalised AI assistant (Interest: 408, Engagement: 0.49)
Uploadcare File Uploader — Take a shortcut to scalable and secure file uploads (Interest: 390, Engagement: 0.29)
Timestripe 3.0 — Get everything organized (Interest: 390, Engagement: 0.12)
Comparisons are generated automatically when two products have enough data overlap. If the pair you want isn't here, the products might be in different categories or too far apart in engagement.
Either the product didn't meet our engagement threshold, or it doesn't share enough category tags with the other product to generate a meaningful comparison. We'd rather show no comparison than a misleading one.
Each product's data reflects its launch period. The comparison shows both products' engagement metrics from when they launched. The build date at the bottom of the page shows when the index was last refreshed.
Not yet. Current comparisons use launch-period data only. Post-launch tracking is on our roadmap.
Generally, yes. Engagement ratio is hard to fake. A product can generate artificial interest, but sustained discussion threads require people who actually used the product and had something to say about it.
Automatically. We compare products that share at least one category and have similar interest scores. Products too far apart in traction don't make for useful comparisons.